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From: Kaz Kylheku <433-929-6894@kylheku.com>
Newsgroups: comp.lang.lisp
Subject: Re: Puzzled by SBCL evaluating some Scheme code
Date: Wed, 27 Mar 2024 06:39:31 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 34
Message-ID: <20240326233251.513@kylheku.com>
References: <87o7b08a6t.fsf@axel-reichert.de>
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On 2024-03-27, Axel Reichert <mail@axel-reichert.de> wrote:
> However, at one point I managed to paste an expression into the wrong
> REPL, SBCL instead of Guile, and got
>
>   (list + - * /)
> evaluated by SBCL as
>
>   (NIL (LIST + - * /) NIL NIL)

In the Common Lisp interactive listener (a.k.a. REPL), there is a
standard variable called - which evaluates to the form currently
being evaluated:

https://www.lispworks.com/documentation/lw50/CLHS/Body/v__.htm

There are also variables +, ++ and +++, which hold less
recent values of -.

https://www.lispworks.com/documentation/lw50/CLHS/Body/v_pl_plp.htm

There also *, ** and ***, which hold the primary value of the
three most recent REPL evaluations, and:

https://www.lispworks.com/documentation/lw50/CLHS/Body/v__stst_.htm

As well as /, // and ///, which hold the lists of all the values
of the three most recent evaluations.

https://www.lispworks.com/documentation/lw50/CLHS/Body/v_sl_sls.htm

-- 
TXR Programming Language: http://nongnu.org/txr
Cygnal: Cygwin Native Application Library: http://kylheku.com/cygnal
Mastodon: @Kazinator@mstdn.ca